83ea47acd7
GCC from 11 onwards defaults to -std=gnu++17 for C++ source files. We want to do the same (https://discourse.llvm.org/t/c-objc-switch-to-gnu-17-as-the-default-dialect/64360). Split RUN lines, adjust `-verify`, or add `__cplusplus < 201703L` or `-Wno-dynamic-exception-spec`, so that tests will pass regardless of gnu++14/gnu++17 default. We have a desire to mark a test compatible with multiple language standards. There are ongoing discussions how to add markers in the long term: * https://discourse.llvm.org/t/iterating-lit-run-lines/62596 * https://discourse.llvm.org/t/lit-run-a-run-line-multiple-times-with-different-replacements/64932 As a workaround in the short term, add lit substitutions `%std_cxx98-`, `%std_cxx11-14`, etc. They can be used for tests which work across multiple language standards. If a range has `n` standards, run lit multiple times, with `LIT_CLANG_STD_GROUP=0`, `LIT_CLANG_STD_GROUP=1`, etc to cover all `n` standards. Reviewed By: #clang-language-wg, aaron.ballman Differential Revision: https://reviews.llvm.org/D131464
39 lines
978 B
C++
39 lines
978 B
C++
// RUN: cp %s %t
|
|
// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++98
|
|
// RUN: not %clang_cc1 -x c++ -std=c++14 -fixit %t -Werror -DFIXIT
|
|
// RUN: %clang_cc1 -x c++ -std=c++14 %t -DFIXIT
|
|
// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++17 -Wc++14-compat
|
|
|
|
namespace foo1::foo2::foo3 {
|
|
#if __cplusplus <= 201400L
|
|
// expected-warning@-2 {{nested namespace definition is a C++17 extension; define each namespace separately}}
|
|
#else
|
|
// expected-warning@-4 {{nested namespace definition is incompatible with C++ standards before C++17}}
|
|
#endif
|
|
int foo(int x) { return x; }
|
|
}
|
|
|
|
#ifndef FIXIT
|
|
inline namespace goo::bar { // expected-error {{nested namespace definition cannot be 'inline'}} expected-warning 0-1{{C++11 feature}}
|
|
int n;
|
|
}
|
|
|
|
int m = goo::bar::n;
|
|
#endif
|
|
|
|
int foo(int x) {
|
|
return foo1::foo2::foo3::foo(x);
|
|
}
|
|
|
|
namespace bar1 {
|
|
namespace bar2 {
|
|
namespace bar3 {
|
|
int bar(int x) { return x; }
|
|
}
|
|
}
|
|
}
|
|
|
|
int bar(int x) {
|
|
return bar1::bar2::bar3::bar(x);
|
|
}
|